is it possible to check the register info change before and after one system call for one thread?

[Guanghui, Cheng]

Hello:
        i want to know whether to know the register info changes before and after one
system call for one thread.
        Especially, the l4_thread_ex_regs could change the pc of one thread. I want
to know the status of other registers after this system call.
        is it possible to use jdb to get this?
        Thanks.
                                                        Cheng Guanghui

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[Björn Döbel]

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Guanghui, Cheng wrote:
> Hello:
> i want to know whether to know the register info changes before and after one
> system call for one thread.
> Especially, the l4_thread_ex_regs could change the pc of one thread. I want
> to know the status of other registers after this system call.
> is it possible to use jdb to get this?

Have you already tried adding an enter_kdebug() before and after the
system call and then looking at the thread's registers?

Bjoern
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[Guanghui, Cheng]

On Thursday 17 September 2009 07:15:55 pm Björn Döbel wrote:
> thread

        Except CS there is no changes about the other registers. It seems that i need
to read the Fiasco source code. But it is ok. Thanks.
                                                Cheng

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